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|
# Copyright 1998-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
from portage.checksum import perform_md5
from portage.const import CACHE_PATH, CONFIG_MEMORY_FILE, PORTAGE_BIN_PATH, \
PRIVATE_PATH, VDB_PATH
from portage.data import portage_gid, portage_uid, secpass
from portage.dbapi import dbapi
from portage.dep import dep_getslot, use_reduce, paren_reduce, isvalidatom, \
isjustname, dep_getkey, match_from_list
from portage.elog import elog_process
from portage.exception import InvalidPackageName, InvalidAtom, \
FileNotFound, PermissionDenied, UnsupportedAPIException
from portage.locks import lockdir, unlockdir
from portage.output import bold, red, green
from portage.update import fixdbentries
from portage.util import apply_secpass_permissions, ConfigProtect, ensure_dirs, \
writemsg, writemsg_stdout, write_atomic, atomic_ofstream, writedict, \
grabfile, grabdict, normalize_path, new_protect_filename
from portage.versions import pkgsplit, catpkgsplit, catsplit, best, pkgcmp
from portage import listdir, dep_expand, flatten, key_expand, \
doebuild_environment, doebuild, env_update, \
abssymlink, movefile, _movefile, bsd_chflags
import os, sys, stat, errno, commands, copy, time
from itertools import izip
try:
import cPickle
except ImportError:
import pickle as cPickle
class PreservedLibsRegistry(object):
""" This class handles the tracking of preserved library objects """
def __init__(self, filename, autocommit=True):
""" @param filename: absolute path for saving the preserved libs records
@type filename: String
@param autocommit: determines if the file is written after every update
@type autocommit: Boolean
"""
self._filename = filename
self._autocommit = autocommit
self.load()
def load(self):
""" Reload the registry data from file """
try:
self._data = cPickle.load(open(self._filename, "r"))
except IOError, e:
if e.errno == errno.ENOENT:
self._data = {}
elif e.errno == PermissionDenied.errno:
raise PermissionDenied(self._filename)
else:
raise e
def store(self):
""" Store the registry data to file. No need to call this if autocommit
was enabled.
"""
cPickle.dump(self._data, open(self._filename, "w"))
def register(self, cpv, slot, counter, paths):
""" Register new objects in the registry. If there is a record with the
same packagename (internally derived from cpv) and slot it is
overwritten with the new data.
@param cpv: package instance that owns the objects
@type cpv: CPV (as String)
@param slot: the value of SLOT of the given package instance
@type slot: String
@param counter: vdb counter value for the package instace
@type counter: Integer
@param paths: absolute paths of objects that got preserved during an update
@type paths: List
"""
cp = "/".join(catpkgsplit(cpv)[:2])
cps = cp+":"+slot
if len(paths) == 0 and self._data.has_key(cps) \
and self._data[cps][0] == cpv and int(self._data[cps][1]) == int(counter):
del self._data[cps]
elif len(paths) > 0:
self._data[cps] = (cpv, counter, paths)
if self._autocommit:
self.store()
def unregister(self, cpv, slot, counter):
""" Remove a previous registration of preserved objects for the given package.
@param cpv: package instance whose records should be removed
@type cpv: CPV (as String)
@param slot: the value of SLOT of the given package instance
@type slot: String
"""
self.register(cpv, slot, counter, [])
def pruneNonExisting(self):
""" Remove all records for objects that no longer exist on the filesystem. """
for cps in self._data.keys():
cpv, counter, paths = self._data[cps]
paths = [f for f in paths if os.path.exists(f)]
if len(paths) > 0:
self._data[cps] = (cpv, counter, paths)
else:
del self._data[cps]
if self._autocommit:
self.store()
def hasEntries(self):
""" Check if this registry contains any records. """
return len(self._data) > 0
def getPreservedLibs(self):
""" Return a mapping of packages->preserved objects.
@returns mapping of package instances to preserved objects
@rtype Dict cpv->list-of-paths
"""
rValue = {}
for cps in self._data:
rValue[self._data[cps][0]] = self._data[cps][2]
return rValue
class LibraryPackageMap(object):
""" This class provides a library->consumer mapping generated from VDB data """
def __init__(self, filename, vardbapi):
self._filename = filename
self._dbapi = vardbapi
def get(self):
""" Read the global library->consumer map for the given vdb instance.
@returns mapping of library objects (just basenames) to consumers (absolute paths)
@rtype filename->list-of-paths
"""
if not os.path.exists(self._filename):
self.update()
rValue = {}
for l in open(self._filename, "r").read().split("\n"):
mysplit = l.split()
if len(mysplit) > 1:
rValue[mysplit[0]] = mysplit[1].split(",")
return rValue
def update(self):
""" Update the global library->consumer map for the given vdb instance. """
obj_dict = {}
for cpv in self._dbapi.cpv_all():
needed_list = self._dbapi.aux_get(cpv, ["NEEDED"])[0]
for l in needed_list.split("\n"):
mysplit = l.split()
if len(mysplit) < 2:
continue
libs = mysplit[1].split(",")
for lib in libs:
if not obj_dict.has_key(lib):
obj_dict[lib] = [mysplit[0]]
else:
obj_dict[lib].append(mysplit[0])
mapfile = open(self._filename, "w")
for lib in obj_dict:
mapfile.write(lib+" "+",".join(obj_dict[lib])+"\n")
mapfile.close()
class vardbapi(dbapi):
def __init__(self, root, categories=None, settings=None, vartree=None):
self.root = root[:]
#cache for category directory mtimes
self.mtdircache = {}
#cache for dependency checks
self.matchcache = {}
#cache for cp_list results
self.cpcache = {}
self.blockers = None
if settings is None:
from portage import settings
self.settings = settings
if categories is None:
categories = settings.categories
self.categories = categories[:]
if vartree is None:
from portage import db
vartree = db[root]["vartree"]
self.vartree = vartree
self._aux_cache_keys = set(["SLOT", "COUNTER", "PROVIDE", "USE",
"IUSE", "DEPEND", "RDEPEND", "PDEPEND", "NEEDED"])
self._aux_cache = None
self._aux_cache_version = "1"
self._aux_cache_filename = os.path.join(self.root,
CACHE_PATH.lstrip(os.path.sep), "vdb_metadata.pickle")
self.libmap = LibraryPackageMap(os.path.join(self.root, CACHE_PATH.lstrip(os.sep), "library_consumers"), self)
try:
self.plib_registry = PreservedLibsRegistry(
os.path.join(self.root, PRIVATE_PATH, "preserved_libs_registry"))
except PermissionDenied:
# apparently this user isn't allowed to access PRIVATE_PATH
self.plib_registry = None
def getpath(self, mykey, filename=None):
rValue = os.path.join(self.root, VDB_PATH, mykey)
if filename != None:
rValue = os.path.join(rValue, filename)
return rValue
def cpv_exists(self, mykey):
"Tells us whether an actual ebuild exists on disk (no masking)"
return os.path.exists(self.getpath(mykey))
def cpv_counter(self, mycpv):
"This method will grab the COUNTER. Returns a counter value."
try:
return long(self.aux_get(mycpv, ["COUNTER"])[0])
except (KeyError, ValueError):
pass
cdir = self.getpath(mycpv)
cpath = self.getpath(mycpv, filename="COUNTER")
# We write our new counter value to a new file that gets moved into
# place to avoid filesystem corruption on XFS (unexpected reboot.)
corrupted = 0
if os.path.exists(cpath):
cfile = open(cpath, "r")
try:
counter = long(cfile.readline())
except ValueError:
print "portage: COUNTER for", mycpv, "was corrupted; resetting to value of 0"
counter = long(0)
corrupted = 1
cfile.close()
elif os.path.exists(cdir):
mys = pkgsplit(mycpv)
myl = self.match(mys[0], use_cache=0)
print mys, myl
if len(myl) == 1:
try:
# Only one package... Counter doesn't matter.
write_atomic(cpath, "1")
counter = 1
except SystemExit, e:
raise
except Exception, e:
writemsg("!!! COUNTER file is missing for "+str(mycpv)+" in /var/db.\n",
noiselevel=-1)
writemsg("!!! Please run %s/fix-db.py or\n" % PORTAGE_BIN_PATH,
noiselevel=-1)
writemsg("!!! unmerge this exact version.\n", noiselevel=-1)
writemsg("!!! %s\n" % e, noiselevel=-1)
sys.exit(1)
else:
writemsg("!!! COUNTER file is missing for "+str(mycpv)+" in /var/db.\n",
noiselevel=-1)
writemsg("!!! Please run %s/fix-db.py or\n" % PORTAGE_BIN_PATH,
noiselevel=-1)
writemsg("!!! remerge the package.\n", noiselevel=-1)
sys.exit(1)
else:
counter = long(0)
if corrupted:
# update new global counter file
write_atomic(cpath, str(counter))
return counter
def cpv_inject(self, mycpv):
"injects a real package into our on-disk database; assumes mycpv is valid and doesn't already exist"
os.makedirs(self.getpath(mycpv))
counter = self.counter_tick(self.root, mycpv=mycpv)
# write local package counter so that emerge clean does the right thing
write_atomic(self.getpath(mycpv, filename="COUNTER"), str(counter))
def isInjected(self, mycpv):
if self.cpv_exists(mycpv):
if os.path.exists(self.getpath(mycpv, filename="INJECTED")):
return True
if not os.path.exists(self.getpath(mycpv, filename="CONTENTS")):
return True
return False
def move_ent(self, mylist):
origcp = mylist[1]
newcp = mylist[2]
# sanity check
for cp in [origcp, newcp]:
if not (isvalidatom(cp) and isjustname(cp)):
raise InvalidPackageName(cp)
origmatches = self.match(origcp, use_cache=0)
moves = 0
if not origmatches:
return moves
for mycpv in origmatches:
mycpsplit = catpkgsplit(mycpv)
mynewcpv = newcp + "-" + mycpsplit[2]
mynewcat = newcp.split("/")[0]
if mycpsplit[3] != "r0":
mynewcpv += "-" + mycpsplit[3]
mycpsplit_new = catpkgsplit(mynewcpv)
origpath = self.getpath(mycpv)
if not os.path.exists(origpath):
continue
moves += 1
if not os.path.exists(self.getpath(mynewcat)):
#create the directory
os.makedirs(self.getpath(mynewcat))
newpath = self.getpath(mynewcpv)
if os.path.exists(newpath):
#dest already exists; keep this puppy where it is.
continue
_movefile(origpath, newpath, mysettings=self.settings)
# We need to rename the ebuild now.
old_pf = catsplit(mycpv)[1]
new_pf = catsplit(mynewcpv)[1]
if new_pf != old_pf:
try:
os.rename(os.path.join(newpath, old_pf + ".ebuild"),
os.path.join(newpath, new_pf + ".ebuild"))
except EnvironmentError, e:
if e.errno != errno.ENOENT:
raise
del e
write_atomic(os.path.join(newpath, "PF"), new_pf+"\n")
write_atomic(os.path.join(newpath, "CATEGORY"), mynewcat+"\n")
fixdbentries([mylist], newpath)
return moves
def cp_list(self, mycp, use_cache=1):
mysplit=catsplit(mycp)
if mysplit[0] == '*':
mysplit[0] = mysplit[0][1:]
try:
mystat = os.stat(self.getpath(mysplit[0]))[stat.ST_MTIME]
except OSError:
mystat = 0
if use_cache and self.cpcache.has_key(mycp):
cpc = self.cpcache[mycp]
if cpc[0] == mystat:
return cpc[1]
list = listdir(self.getpath(mysplit[0]), EmptyOnError=1)
if (list is None):
return []
returnme = []
for x in list:
if x.startswith("."):
continue
if x[0] == '-':
#writemsg(red("INCOMPLETE MERGE:")+str(x[len("-MERGING-"):])+"\n")
continue
ps = pkgsplit(x)
if not ps:
self.invalidentry(os.path.join(self.getpath(mysplit[0]), x))
continue
if len(mysplit) > 1:
if ps[0] == mysplit[1]:
returnme.append(mysplit[0]+"/"+x)
if use_cache:
self.cpcache[mycp] = [mystat,returnme]
elif self.cpcache.has_key(mycp):
del self.cpcache[mycp]
return returnme
def cpv_all(self, use_cache=1):
returnme = []
basepath = os.path.join(self.root, VDB_PATH) + os.path.sep
for x in self.categories:
for y in listdir(basepath + x, EmptyOnError=1):
if y.startswith("."):
continue
subpath = x + "/" + y
# -MERGING- should never be a cpv, nor should files.
if os.path.isdir(basepath + subpath) and (pkgsplit(y) is not None):
returnme += [subpath]
return returnme
def cp_all(self, use_cache=1):
mylist = self.cpv_all(use_cache=use_cache)
d={}
for y in mylist:
if y[0] == '*':
y = y[1:]
mysplit = catpkgsplit(y)
if not mysplit:
self.invalidentry(self.getpath(y))
continue
d[mysplit[0]+"/"+mysplit[1]] = None
return d.keys()
def checkblockers(self, origdep):
pass
def match(self, origdep, use_cache=1):
"caching match function"
mydep = dep_expand(
origdep, mydb=self, use_cache=use_cache, settings=self.settings)
mykey = dep_getkey(mydep)
mycat = catsplit(mykey)[0]
if not use_cache:
if self.matchcache.has_key(mycat):
del self.mtdircache[mycat]
del self.matchcache[mycat]
mymatch = match_from_list(mydep,
self.cp_list(mykey, use_cache=use_cache))
myslot = dep_getslot(mydep)
if myslot is not None:
mymatch = [cpv for cpv in mymatch \
if self.aux_get(cpv, ["SLOT"])[0] == myslot]
return mymatch
try:
curmtime = os.stat(self.root+VDB_PATH+"/"+mycat)[stat.ST_MTIME]
except (IOError, OSError):
curmtime=0
if not self.matchcache.has_key(mycat) or not self.mtdircache[mycat]==curmtime:
# clear cache entry
self.mtdircache[mycat] = curmtime
self.matchcache[mycat] = {}
if not self.matchcache[mycat].has_key(mydep):
mymatch = match_from_list(mydep, self.cp_list(mykey, use_cache=use_cache))
myslot = dep_getslot(mydep)
if myslot is not None:
mymatch = [cpv for cpv in mymatch \
if self.aux_get(cpv, ["SLOT"])[0] == myslot]
self.matchcache[mycat][mydep] = mymatch
return self.matchcache[mycat][mydep][:]
def findname(self, mycpv):
return self.getpath(str(mycpv), filename=catsplit(mycpv)[1]+".ebuild")
def flush_cache(self):
"""If the current user has permission and the internal aux_get cache has
been updated, save it to disk and mark it unmodified. This is called
by emerge after it has loaded the full vdb for use in dependency
calculations. Currently, the cache is only written if the user has
superuser privileges (since that's required to obtain a lock), but all
users have read access and benefit from faster metadata lookups (as
long as at least part of the cache is still valid)."""
if self._aux_cache is not None and \
self._aux_cache["modified"] and \
secpass >= 2:
valid_nodes = set(self.cpv_all())
for cpv in self._aux_cache["packages"].keys():
if cpv not in valid_nodes:
del self._aux_cache["packages"][cpv]
del self._aux_cache["modified"]
try:
f = atomic_ofstream(self._aux_cache_filename)
cPickle.dump(self._aux_cache, f, -1)
f.close()
apply_secpass_permissions(
self._aux_cache_filename, gid=portage_gid, mode=0644)
except (IOError, OSError), e:
pass
self._aux_cache["modified"] = False
def aux_get(self, mycpv, wants):
"""This automatically caches selected keys that are frequently needed
by emerge for dependency calculations. The cached metadata is
considered valid if the mtime of the package directory has not changed
since the data was cached. The cache is stored in a pickled dict
object with the following format:
{version:"1", "packages":{cpv1:(mtime,{k1,v1, k2,v2, ...}), cpv2...}}
If an error occurs while loading the cache pickle or the version is
unrecognized, the cache will simple be recreated from scratch (it is
completely disposable).
"""
if not self._aux_cache_keys.intersection(wants):
return self._aux_get(mycpv, wants)
if self._aux_cache is None:
try:
f = open(self._aux_cache_filename)
mypickle = cPickle.Unpickler(f)
mypickle.find_global = None
self._aux_cache = mypickle.load()
f.close()
del f
except (IOError, OSError, EOFError, cPickle.UnpicklingError):
pass
if not self._aux_cache or \
not isinstance(self._aux_cache, dict) or \
self._aux_cache.get("version") != self._aux_cache_version or \
not self._aux_cache.get("packages"):
self._aux_cache = {"version": self._aux_cache_version}
self._aux_cache["packages"] = {}
self._aux_cache["modified"] = False
mydir = self.getpath(mycpv)
mydir_stat = None
try:
mydir_stat = os.stat(mydir)
except OSError, e:
if e.errno != errno.ENOENT:
raise
raise KeyError(mycpv)
mydir_mtime = long(mydir_stat.st_mtime)
pkg_data = self._aux_cache["packages"].get(mycpv)
mydata = {}
cache_valid = False
if pkg_data:
cache_mtime, metadata = pkg_data
cache_valid = cache_mtime == mydir_mtime
if cache_valid:
cache_incomplete = self._aux_cache_keys.difference(metadata)
if cache_incomplete:
# Allow self._aux_cache_keys to change without a cache version
# bump and efficiently recycle partial cache whenever possible.
cache_valid = False
pull_me = cache_incomplete.union(wants)
else:
pull_me = set(wants).difference(self._aux_cache_keys)
mydata.update(metadata)
else:
pull_me = self._aux_cache_keys.union(wants)
if pull_me:
# pull any needed data and cache it
aux_keys = list(pull_me)
for k, v in izip(aux_keys, self._aux_get(mycpv, aux_keys)):
mydata[k] = v
if not cache_valid:
cache_data = {}
for aux_key in self._aux_cache_keys:
cache_data[aux_key] = mydata[aux_key]
self._aux_cache["packages"][mycpv] = (mydir_mtime, cache_data)
self._aux_cache["modified"] = True
return [mydata[x] for x in wants]
def _aux_get(self, mycpv, wants):
mydir = self.getpath(mycpv)
try:
if not stat.S_ISDIR(os.stat(mydir).st_mode):
raise KeyError(mycpv)
except OSError, e:
if e.errno == errno.ENOENT:
raise KeyError(mycpv)
del e
raise
results = []
for x in wants:
try:
myf = open(os.path.join(mydir, x), "r")
try:
myd = myf.read()
finally:
myf.close()
myd = " ".join(myd.split())
except IOError:
myd = ""
if x == "EAPI" and not myd:
results.append("0")
else:
results.append(myd)
return results
def aux_update(self, cpv, values):
cat, pkg = catsplit(cpv)
mylink = dblink(cat, pkg, self.root, self.settings,
treetype="vartree", vartree=self.vartree)
if not mylink.exists():
raise KeyError(cpv)
for k, v in values.iteritems():
if v:
mylink.setfile(k, v)
else:
try:
os.unlink(os.path.join(self.getpath(cpv), k))
except EnvironmentError:
pass
def counter_tick(self, myroot, mycpv=None):
return self.counter_tick_core(myroot, incrementing=1, mycpv=mycpv)
def get_counter_tick_core(self, myroot, mycpv=None):
return self.counter_tick_core(myroot, incrementing=0, mycpv=mycpv) + 1
def counter_tick_core(self, myroot, incrementing=1, mycpv=None):
"This method will grab the next COUNTER value and record it back to the global file. Returns new counter value."
cpath = os.path.join(myroot, CACHE_PATH.lstrip(os.sep), "counter")
changed = 0
min_counter = 0
if mycpv:
mysplit = pkgsplit(mycpv)
for x in self.match(mysplit[0], use_cache=0):
if x == mycpv:
continue
try:
old_counter = long(self.aux_get(x, ["COUNTER"])[0])
writemsg("COUNTER '%d' '%s'\n" % (old_counter, x), 1)
except (ValueError, KeyError): # valueError from long(), KeyError from aux_get
old_counter = 0
writemsg("!!! BAD COUNTER in '%s'\n" % (x), noiselevel=-1)
if old_counter > min_counter:
min_counter = old_counter
# We write our new counter value to a new file that gets moved into
# place to avoid filesystem corruption.
find_counter = ("find '%s' -type f -name COUNTER | " + \
"while read f; do echo $(<\"${f}\"); done | " + \
"sort -n | tail -n1") % os.path.join(self.root, VDB_PATH)
if os.path.exists(cpath):
cfile = open(cpath, "r")
try:
counter = long(cfile.readline())
except (ValueError,OverflowError):
try:
counter = long(commands.getoutput(find_counter).strip())
writemsg("!!! COUNTER was corrupted; resetting to value of %d\n" % counter,
noiselevel=-1)
changed=1
except (ValueError, OverflowError):
writemsg("!!! COUNTER data is corrupt in pkg db. The values need to be\n",
noiselevel=-1)
writemsg("!!! corrected/normalized so that portage can operate properly.\n",
noiselevel=-1)
writemsg("!!! A simple solution is not yet available so try #gentoo on IRC.\n")
sys.exit(2)
cfile.close()
else:
try:
counter = long(commands.getoutput(find_counter).strip())
writemsg("!!! Global counter missing. Regenerated from counter files to: %s\n" % counter,
noiselevel=-1)
except ValueError: # Value Error for long(), probably others for commands.getoutput
writemsg("!!! Initializing global counter.\n", noiselevel=-1)
counter = long(0)
changed = 1
if counter < min_counter:
counter = min_counter + 1000
changed = 1
if incrementing or changed:
#increment counter
counter += 1
# update new global counter file
write_atomic(cpath, str(counter))
return counter
class vartree(object):
"this tree will scan a var/db/pkg database located at root (passed to init)"
def __init__(self, root="/", virtual=None, clone=None, categories=None,
settings=None):
if clone:
writemsg("vartree.__init__(): deprecated " + \
"use of clone parameter\n", noiselevel=-1)
self.root = clone.root[:]
self.dbapi = copy.deepcopy(clone.dbapi)
self.populated = 1
from portage import config
self.settings = config(clone=clone.settings)
else:
self.root = root[:]
if settings is None:
from portage import settings
self.settings = settings # for key_expand calls
if categories is None:
categories = settings.categories
self.dbapi = vardbapi(self.root, categories=categories,
settings=settings, vartree=self)
self.populated = 1
def getpath(self, mykey, filename=None):
rValue = self.getpath(mykey)
if filename != None:
rValue = os.path.join(rValue, filename)
return rValue
def zap(self, mycpv):
return
def inject(self, mycpv):
return
def get_provide(self, mycpv):
myprovides = []
mylines = None
try:
mylines, myuse = self.dbapi.aux_get(mycpv, ["PROVIDE", "USE"])
if mylines:
myuse = myuse.split()
mylines = flatten(use_reduce(paren_reduce(mylines), uselist=myuse))
for myprovide in mylines:
mys = catpkgsplit(myprovide)
if not mys:
mys = myprovide.split("/")
myprovides += [mys[0] + "/" + mys[1]]
return myprovides
except SystemExit, e:
raise
except Exception, e:
mydir = self.getpath(mycpv)
writemsg("\nParse Error reading PROVIDE and USE in '%s'\n" % mydir,
noiselevel=-1)
if mylines:
writemsg("Possibly Invalid: '%s'\n" % str(mylines),
noiselevel=-1)
writemsg("Exception: %s\n\n" % str(e), noiselevel=-1)
return []
def get_all_provides(self):
myprovides = {}
for node in self.getallcpv():
for mykey in self.get_provide(node):
if myprovides.has_key(mykey):
myprovides[mykey] += [node]
else:
myprovides[mykey] = [node]
return myprovides
def dep_bestmatch(self, mydep, use_cache=1):
"compatibility method -- all matches, not just visible ones"
#mymatch=best(match(dep_expand(mydep,self.dbapi),self.dbapi))
mymatch = best(self.dbapi.match(
dep_expand(mydep, mydb=self.dbapi, settings=self.settings),
use_cache=use_cache))
if mymatch is None:
return ""
else:
return mymatch
def dep_match(self, mydep, use_cache=1):
"compatibility method -- we want to see all matches, not just visible ones"
#mymatch = match(mydep,self.dbapi)
mymatch = self.dbapi.match(mydep, use_cache=use_cache)
if mymatch is None:
return []
else:
return mymatch
def exists_specific(self, cpv):
return self.dbapi.cpv_exists(cpv)
def getallcpv(self):
"""temporary function, probably to be renamed --- Gets a list of all
category/package-versions installed on the system."""
return self.dbapi.cpv_all()
def getallnodes(self):
"""new behavior: these are all *unmasked* nodes. There may or may not be available
masked package for nodes in this nodes list."""
return self.dbapi.cp_all()
def exists_specific_cat(self, cpv, use_cache=1):
cpv = key_expand(cpv, mydb=self.dbapi, use_cache=use_cache,
settings=self.settings)
a = catpkgsplit(cpv)
if not a:
return 0
mylist = listdir(self.getpath(a[0]), EmptyOnError=1)
for x in mylist:
b = pkgsplit(x)
if not b:
self.dbapi.invalidentry(self.getpath(a[0], filename=x))
continue
if a[1] == b[0]:
return 1
return 0
def getebuildpath(self, fullpackage):
cat, package = catsplit(fullpackage)
return self.getpath(fullpackage, filename=package+".ebuild")
def getnode(self, mykey, use_cache=1):
mykey = key_expand(mykey, mydb=self.dbapi, use_cache=use_cache,
settings=self.settings)
if not mykey:
return []
mysplit = catsplit(mykey)
mydirlist = listdir(self.getpath(mysplit[0]),EmptyOnError=1)
returnme = []
for x in mydirlist:
mypsplit = pkgsplit(x)
if not mypsplit:
self.dbapi.invalidentry(self.getpath(mysplit[0], filename=x))
continue
if mypsplit[0] == mysplit[1]:
appendme = [mysplit[0]+"/"+x, [mysplit[0], mypsplit[0], mypsplit[1], mypsplit[2]]]
returnme.append(appendme)
return returnme
def getslot(self, mycatpkg):
"Get a slot for a catpkg; assume it exists."
try:
return self.dbapi.aux_get(mycatpkg, ["SLOT"])[0]
except KeyError:
return ""
def hasnode(self, mykey, use_cache):
"""Does the particular node (cat/pkg key) exist?"""
mykey = key_expand(mykey, mydb=self.dbapi, use_cache=use_cache,
settings=self.settings)
mysplit = catsplit(mykey)
mydirlist = listdir(self.getpath(mysplit[0]), EmptyOnError=1)
for x in mydirlist:
mypsplit = pkgsplit(x)
if not mypsplit:
self.dbapi.invalidentry(self.getpath(mysplit[0], filename=x))
continue
if mypsplit[0] == mysplit[1]:
return 1
return 0
def populate(self):
self.populated=1
class dblink(object):
"""
This class provides an interface to the installed package database
At present this is implemented as a text backend in /var/db/pkg.
"""
def __init__(self, cat, pkg, myroot, mysettings, treetype=None,
vartree=None):
"""
Creates a DBlink object for a given CPV.
The given CPV may not be present in the database already.
@param cat: Category
@type cat: String
@param pkg: Package (PV)
@type pkg: String
@param myroot: Typically ${ROOT}
@type myroot: String (Path)
@param mysettings: Typically portage.config
@type mysettings: An instance of portage.config
@param treetype: one of ['porttree','bintree','vartree']
@type treetype: String
@param vartree: an instance of vartree corresponding to myroot.
@type vartree: vartree
"""
self.cat = cat
self.pkg = pkg
self.mycpv = self.cat + "/" + self.pkg
self.mysplit = pkgsplit(self.mycpv)
self.treetype = treetype
if vartree is None:
from portage import db
vartree = db[myroot]["vartree"]
self.vartree = vartree
self.dbroot = normalize_path(os.path.join(myroot, VDB_PATH))
self.dbcatdir = self.dbroot+"/"+cat
self.dbpkgdir = self.dbcatdir+"/"+pkg
self.dbtmpdir = self.dbcatdir+"/-MERGING-"+pkg
self.dbdir = self.dbpkgdir
self._lock_vdb = None
self.settings = mysettings
if self.settings == 1:
raise ValueError
self.myroot=myroot
protect_obj = ConfigProtect(myroot,
mysettings.get("CONFIG_PROTECT","").split(),
mysettings.get("CONFIG_PROTECT_MASK","").split())
self.updateprotect = protect_obj.updateprotect
self.isprotected = protect_obj.isprotected
self._installed_instance = None
self.contentscache = None
self._contents_inodes = None
def lockdb(self):
if self._lock_vdb:
raise AssertionError("Lock already held.")
# At least the parent needs to exist for the lock file.
ensure_dirs(self.dbroot)
self._lock_vdb = lockdir(self.dbroot)
def unlockdb(self):
if self._lock_vdb:
unlockdir(self._lock_vdb)
self._lock_vdb = None
def getpath(self):
"return path to location of db information (for >>> informational display)"
return self.dbdir
def exists(self):
"does the db entry exist? boolean."
return os.path.exists(self.dbdir)
def delete(self):
"""
Remove this entry from the database
"""
if not os.path.exists(self.dbdir):
return
try:
for x in listdir(self.dbdir):
os.unlink(self.dbdir+"/"+x)
os.rmdir(self.dbdir)
except OSError, e:
print "!!! Unable to remove db entry for this package."
print "!!! It is possible that a directory is in this one. Portage will still"
print "!!! register this package as installed as long as this directory exists."
print "!!! You may delete this directory with 'rm -Rf "+self.dbdir+"'"
print "!!! "+str(e)
print
sys.exit(1)
def clearcontents(self):
"""
For a given db entry (self), erase the CONTENTS values.
"""
if os.path.exists(self.dbdir+"/CONTENTS"):
os.unlink(self.dbdir+"/CONTENTS")
def getcontents(self):
"""
Get the installed files of a given package (aka what that package installed)
"""
contents_file = os.path.join(self.dbdir, "CONTENTS")
if self.contentscache is not None:
return self.contentscache
pkgfiles = {}
try:
myc = open(contents_file,"r")
except EnvironmentError, e:
if e.errno != errno.ENOENT:
raise
del e
self.contentscache = pkgfiles
return pkgfiles
mylines = myc.readlines()
myc.close()
null_byte = "\0"
pos = 0
for line in mylines:
pos += 1
if null_byte in line:
# Null bytes are a common indication of corruption.
writemsg("!!! Null byte found in contents " + \
"file, line %d: '%s'\n" % (pos, contents_file),
noiselevel=-1)
continue
mydat = line.split()
# we do this so we can remove from non-root filesystems
# (use the ROOT var to allow maintenance on other partitions)
try:
mydat[1] = normalize_path(os.path.join(
self.myroot, mydat[1].lstrip(os.path.sep)))
if mydat[0] == "obj":
#format: type, mtime, md5sum
pkgfiles[" ".join(mydat[1:-2])] = [mydat[0], mydat[-1], mydat[-2]]
elif mydat[0] == "dir":
#format: type
pkgfiles[" ".join(mydat[1:])] = [mydat[0] ]
elif mydat[0] == "sym":
#format: type, mtime, dest
x = len(mydat) - 1
if (x >= 13) and (mydat[-1][-1] == ')'): # Old/Broken symlink entry
mydat = mydat[:-10] + [mydat[-10:][stat.ST_MTIME][:-1]]
writemsg("FIXED SYMLINK LINE: %s\n" % mydat, 1)
x = len(mydat) - 1
splitter = -1
while (x >= 0):
if mydat[x] == "->":
splitter = x
break
x = x - 1
if splitter == -1:
return None
pkgfiles[" ".join(mydat[1:splitter])] = [mydat[0], mydat[-1], " ".join(mydat[(splitter+1):-1])]
elif mydat[0] == "dev":
#format: type
pkgfiles[" ".join(mydat[1:])] = [mydat[0] ]
elif mydat[0]=="fif":
#format: type
pkgfiles[" ".join(mydat[1:])] = [mydat[0]]
else:
writemsg("!!! Unrecognized CONTENTS entry on " + \
"line %d: '%s'\n" % (pos, line), noiselevel=-1)
except (KeyError, IndexError):
writemsg("!!! Unrecognized CONTENTS entry on " + \
"line %d: '%s'\n" % (pos, line), noiselevel=-1)
self.contentscache = pkgfiles
return pkgfiles
def unmerge(self, pkgfiles=None, trimworld=1, cleanup=1,
ldpath_mtimes=None, others_in_slot=None):
"""
Calls prerm
Unmerges a given package (CPV)
calls postrm
calls cleanrm
calls env_update
@param pkgfiles: files to unmerge (generally self.getcontents() )
@type pkgfiles: Dictionary
@param trimworld: Remove CPV from world file if True, not if False
@type trimworld: Boolean
@param cleanup: cleanup to pass to doebuild (see doebuild)
@type cleanup: Boolean
@param ldpath_mtimes: mtimes to pass to env_update (see env_update)
@type ldpath_mtimes: Dictionary
@param others_in_slot: all dblink instances in this slot, excluding self
@type others_in_slot: list
@rtype: Integer
@returns:
1. os.EX_OK if everything went well.
2. return code of the failed phase (for prerm, postrm, cleanrm)
Notes:
The caller must ensure that lockdb() and unlockdb() are called
before and after this method.
"""
# When others_in_slot is supplied, the security check has already been
# done for this slot, so it shouldn't be repeated until the next
# replacement or unmerge operation.
if others_in_slot is None:
slot = self.vartree.dbapi.aux_get(self.mycpv, ["SLOT"])[0]
slot_matches = self.vartree.dbapi.match(
"%s:%s" % (dep_getkey(self.mycpv), slot))
others_in_slot = []
for cur_cpv in slot_matches:
if cur_cpv == self.mycpv:
continue
others_in_slot.append(dblink(self.cat, catsplit(cur_cpv)[1],
self.vartree.root, self.settings, vartree=self.vartree))
retval = self._security_check([self] + others_in_slot)
if retval:
return retval
contents = self.getcontents()
# Now, don't assume that the name of the ebuild is the same as the
# name of the dir; the package may have been moved.
myebuildpath = None
mystuff = listdir(self.dbdir, EmptyOnError=1)
for x in mystuff:
if x.endswith(".ebuild"):
myebuildpath = os.path.join(self.dbdir, self.pkg + ".ebuild")
if x[:-7] != self.pkg:
# Clean up after vardbapi.move_ent() breakage in
# portage versions before 2.1.2
os.rename(os.path.join(self.dbdir, x), myebuildpath)
write_atomic(os.path.join(self.dbdir, "PF"), self.pkg+"\n")
break
self.settings.load_infodir(self.dbdir)
if myebuildpath:
try:
doebuild_environment(myebuildpath, "prerm", self.myroot,
self.settings, 0, 0, self.vartree.dbapi)
except UnsupportedAPIException, e:
# Sometimes this happens due to corruption of the EAPI file.
writemsg("!!! FAILED prerm: %s\n" % \
os.path.join(self.dbdir, "EAPI"), noiselevel=-1)
writemsg("%s\n" % str(e), noiselevel=-1)
return 1
catdir = os.path.dirname(self.settings["PORTAGE_BUILDDIR"])
ensure_dirs(os.path.dirname(catdir),
uid=portage_uid, gid=portage_gid, mode=070, mask=0)
builddir_lock = None
catdir_lock = None
retval = -1
try:
if myebuildpath:
catdir_lock = lockdir(catdir)
ensure_dirs(catdir,
uid=portage_uid, gid=portage_gid,
mode=070, mask=0)
builddir_lock = lockdir(
self.settings["PORTAGE_BUILDDIR"])
try:
unlockdir(catdir_lock)
finally:
catdir_lock = None
# Eventually, we'd like to pass in the saved ebuild env here...
retval = doebuild(myebuildpath, "prerm", self.myroot,
self.settings, cleanup=cleanup, use_cache=0,
mydbapi=self.vartree.dbapi, tree="vartree",
vartree=self.vartree)
# XXX: Decide how to handle failures here.
if retval != os.EX_OK:
writemsg("!!! FAILED prerm: %s\n" % retval, noiselevel=-1)
return retval
self._unmerge_pkgfiles(pkgfiles, others_in_slot)
# Remove the registration of preserved libs for this pkg instance
self.vartree.dbapi.plib_registry.unregister(self.mycpv, self.settings["SLOT"], self.settings["COUNTER"])
if myebuildpath:
retval = doebuild(myebuildpath, "postrm", self.myroot,
self.settings, use_cache=0, tree="vartree",
mydbapi=self.vartree.dbapi, vartree=self.vartree)
# XXX: Decide how to handle failures here.
if retval != os.EX_OK:
writemsg("!!! FAILED postrm: %s\n" % retval, noiselevel=-1)
return retval
# regenerate reverse NEEDED map
self.vartree.dbapi.libmap.update()
finally:
if builddir_lock:
try:
if myebuildpath:
# process logs created during pre/postrm
elog_process(self.mycpv, self.settings)
if retval == os.EX_OK:
doebuild(myebuildpath, "cleanrm", self.myroot,
self.settings, tree="vartree",
mydbapi=self.vartree.dbapi,
vartree=self.vartree)
finally:
unlockdir(builddir_lock)
try:
if myebuildpath and not catdir_lock:
# Lock catdir for removal if empty.
catdir_lock = lockdir(catdir)
finally:
if catdir_lock:
try:
os.rmdir(catdir)
except OSError, e:
if e.errno not in (errno.ENOENT,
errno.ENOTEMPTY, errno.EEXIST):
raise
del e
unlockdir(catdir_lock)
env_update(target_root=self.myroot, prev_mtimes=ldpath_mtimes,
contents=contents, env=self.settings.environ())
return os.EX_OK
def _unmerge_pkgfiles(self, pkgfiles, others_in_slot):
"""
Unmerges the contents of a package from the liveFS
Removes the VDB entry for self
@param pkgfiles: typically self.getcontents()
@type pkgfiles: Dictionary { filename: [ 'type', '?', 'md5sum' ] }
@param others_in_slot: all dblink instances in this slot, excluding self
@type others_in_slot: list
@rtype: None
"""
if not pkgfiles:
writemsg_stdout("No package files given... Grabbing a set.\n")
pkgfiles = self.getcontents()
if others_in_slot is None:
others_in_slot = []
slot = self.vartree.dbapi.aux_get(self.mycpv, ["SLOT"])[0]
slot_matches = self.vartree.dbapi.match(
"%s:%s" % (dep_getkey(self.mycpv), slot))
for cur_cpv in slot_matches:
if cur_cpv == self.mycpv:
continue
others_in_slot.append(dblink(self.cat, catsplit(cur_cpv)[1],
self.vartree.root, self.settings,
vartree=self.vartree))
dest_root = normalize_path(self.vartree.root).rstrip(os.path.sep) + \
os.path.sep
dest_root_len = len(dest_root)
unmerge_orphans = "unmerge-orphans" in self.settings.features
if pkgfiles:
mykeys = pkgfiles.keys()
mykeys.sort()
mykeys.reverse()
#process symlinks second-to-last, directories last.
mydirs = []
modprotect = os.path.join(self.vartree.root, "lib/modules/")
def show_unmerge(zing, desc, file_type, file_name):
writemsg_stdout("%s %s %s %s\n" % \
(zing, desc.ljust(8), file_type, file_name))
for objkey in mykeys:
obj = normalize_path(objkey)
file_data = pkgfiles[objkey]
file_type = file_data[0]
statobj = None
try:
statobj = os.stat(obj)
except OSError:
pass
lstatobj = None
try:
lstatobj = os.lstat(obj)
except (OSError, AttributeError):
pass
islink = lstatobj is not None and stat.S_ISLNK(lstatobj.st_mode)
if lstatobj is None:
show_unmerge("---", "!found", file_type, obj)
continue
if obj.startswith(dest_root):
relative_path = obj[dest_root_len:]
is_owned = False
for dblnk in others_in_slot:
if dblnk.isowner(relative_path, dest_root):
is_owned = True
break
if is_owned:
# A new instance of this package claims the file, so
# don't unmerge it.
show_unmerge("---", "replaced", file_type, obj)
continue
# next line includes a tweak to protect modules from being unmerged,
# but we don't protect modules from being overwritten if they are
# upgraded. We effectively only want one half of the config protection
# functionality for /lib/modules. For portage-ng both capabilities
# should be able to be independently specified.
if obj.startswith(modprotect):
show_unmerge("---", "cfgpro", file_type, obj)
continue
# Don't unlink symlinks to directories here since that can
# remove /lib and /usr/lib symlinks.
if unmerge_orphans and \
lstatobj and not stat.S_ISDIR(lstatobj.st_mode) and \
not (islink and statobj and stat.S_ISDIR(statobj.st_mode)) and \
not self.isprotected(obj):
try:
# Remove permissions to ensure that any hardlinks to
# suid/sgid files are rendered harmless.
if statobj and not islink:
os.chmod(obj, 0)
os.unlink(obj)
except EnvironmentError, e:
pass
show_unmerge("<<<", "", file_type, obj)
continue
lmtime = str(lstatobj[stat.ST_MTIME])
if (pkgfiles[objkey][0] not in ("dir", "fif", "dev")) and (lmtime != pkgfiles[objkey][1]):
show_unmerge("---", "!mtime", file_type, obj)
continue
if pkgfiles[objkey][0] == "dir":
if statobj is None or not stat.S_ISDIR(statobj.st_mode):
show_unmerge("---", "!dir", file_type, obj)
continue
mydirs.append(obj)
elif pkgfiles[objkey][0] == "sym":
if not islink:
show_unmerge("---", "!sym", file_type, obj)
continue
# Go ahead and unlink symlinks to directories here when
# they're actually recorded as symlinks in the contents.
# Normally, symlinks such as /lib -> lib64 are not recorded
# as symlinks in the contents of a package. If a package
# installs something into ${D}/lib/, it is recorded in the
# contents as a directory even if it happens to correspond
# to a symlink when it's merged to the live filesystem.
try:
os.unlink(obj)
show_unmerge("<<<", "", file_type, obj)
except (OSError, IOError),e:
show_unmerge("!!!", "", file_type, obj)
elif pkgfiles[objkey][0] == "obj":
if statobj is None or not stat.S_ISREG(statobj.st_mode):
show_unmerge("---", "!obj", file_type, obj)
continue
mymd5 = None
try:
mymd5 = perform_md5(obj, calc_prelink=1)
except FileNotFound, e:
# the file has disappeared between now and our stat call
show_unmerge("---", "!obj", file_type, obj)
continue
# string.lower is needed because db entries used to be in upper-case. The
# string.lower allows for backwards compatibility.
if mymd5 != pkgfiles[objkey][2].lower():
show_unmerge("---", "!md5", file_type, obj)
continue
try:
# Remove permissions to ensure that any hardlinks to
# suid/sgid files are rendered harmless.
if not islink:
os.chmod(obj, 0)
os.unlink(obj)
except (OSError, IOError), e:
pass
show_unmerge("<<<", "", file_type, obj)
elif pkgfiles[objkey][0] == "fif":
if not stat.S_ISFIFO(lstatobj[stat.ST_MODE]):
show_unmerge("---", "!fif", file_type, obj)
continue
show_unmerge("---", "", file_type, obj)
elif pkgfiles[objkey][0] == "dev":
show_unmerge("---", "", file_type, obj)
mydirs.sort()
mydirs.reverse()
for obj in mydirs:
try:
os.rmdir(obj)
show_unmerge("<<<", "", "dir", obj)
except EnvironmentError:
show_unmerge("---", "!empty", "dir", obj)
#remove self from vartree database so that our own virtual gets zapped if we're the last node
self.vartree.zap(self.mycpv)
def isowner(self,filename, destroot):
"""
Check if filename is a new file or belongs to this package
(for this or a previous version)
@param filename:
@type filename:
@param destroot:
@type destroot:
@rtype: Boolean
@returns:
1. True if this package owns the file.
2. False if this package does not own the file.
"""
destfile = normalize_path(
os.path.join(destroot, filename.lstrip(os.path.sep)))
pkgfiles = self.getcontents()
if pkgfiles and destfile in pkgfiles:
return True
if pkgfiles:
try:
mylstat = os.lstat(destfile)
except EnvironmentError, e:
if e.errno != errno.ENOENT:
raise
del e
return True
if self._contents_inodes is None:
self._contents_inodes = set()
for x in pkgfiles:
try:
lstat = os.lstat(x)
self._contents_inodes.add((lstat.st_dev, lstat.st_ino))
except OSError:
pass
if (mylstat.st_dev, mylstat.st_ino) in self._contents_inodes:
return True
return False
def _preserve_libs(self, srcroot, destroot, mycontents, counter):
# read global reverse NEEDED map
libmap = self.vartree.dbapi.libmap.get()
# get list of libraries from old package instance
old_contents = self._installed_instance.getcontents().keys()
old_libs = set([os.path.basename(x) for x in old_contents]).intersection(libmap)
# get list of libraries from new package instance
mylibs = set([os.path.basename(x) for x in mycontents]).intersection(libmap)
# check which libs are present in the old, but not the new package instance
preserve_libs = old_libs.difference(mylibs)
# ignore any libs that are only internally used by the package
def has_external_consumers(lib, contents, otherlibs):
consumers = set(libmap[lib])
contents_without_libs = [x for x in contents if not os.path.basename(x) in otherlibs]
# just used by objects that will be autocleaned
if len(consumers.difference(contents_without_libs)) == 0:
return False
# used by objects that are referenced as well, need to check those
# recursively to break any reference cycles
elif len(consumers.difference(contents)) == 0:
otherlibs = set(otherlibs)
for ol in otherlibs.intersection(consumers):
if has_external_consumers(ol, contents, otherlibs.difference([lib])):
return True
return False
# used by external objects directly
else:
return True
for lib in list(preserve_libs):
if not has_external_consumers(lib, old_contents, preserve_libs):
preserve_libs.remove(lib)
# get the real paths for the libs
preserve_paths = [x for x in old_contents if os.path.basename(x) in preserve_libs]
del old_contents, old_libs, mylibs, preserve_libs
# inject files that should be preserved into our image dir
import shutil
for x in preserve_paths:
print "injecting %s into %s" % (x, srcroot)
mydir = os.path.join(srcroot, os.path.dirname(x))
if not os.path.exists(mydir):
os.makedirs(mydir)
# resolve symlinks and extend preserve list
# NOTE: we're extending the list in the loop to emulate recursion to
# also get indirect symlinks
if os.path.islink(x):
linktarget = os.readlink(x)
os.symlink(linktarget, os.path.join(srcroot, x.lstrip(os.sep)))
if linktarget[0] != os.sep:
linktarget = os.path.join(os.path.dirname(x), linktarget)
preserve_paths.append(linktarget)
else:
shutil.copy2(os.path.join(destroot, x), os.path.join(srcroot, x.lstrip(os.sep)))
# keep track of the libs we preserved
self.vartree.dbapi.plib_registry.register(self.mycpv, self.settings["SLOT"], counter, preserve_paths)
del preserve_paths
def _collision_protect(self, srcroot, destroot, mypkglist, mycontents, mysymlinks):
collision_ignore = set([normalize_path(myignore) for myignore in \
self.settings.get("COLLISION_IGNORE", "").split()])
# the linkcheck only works if we are in srcroot
mycwd = os.getcwd()
os.chdir(srcroot)
mysymlinked_directories = [s + os.path.sep for s in mysymlinks]
del mysymlinks
stopmerge = False
i=0
collisions = []
print green("*")+" checking "+str(len(mycontents))+" files for package collisions"
for f in mycontents:
nocheck = False
# listdir isn't intelligent enough to exclude symlinked dirs,
# so we have to do it ourself
for s in mysymlinked_directories:
if f.startswith(s):
nocheck = True
break
if nocheck:
continue
i = i + 1
if i % 1000 == 0:
print str(i)+" files checked ..."
dest_path = normalize_path(
os.path.join(destroot, f.lstrip(os.path.sep)))
try:
dest_lstat = os.lstat(dest_path)
except EnvironmentError, e:
if e.errno != errno.ENOENT:
raise
del e
continue
if f[0] != "/":
f="/"+f
isowned = False
for ver in [self] + mypkglist:
if (ver.isowner(f, destroot) or ver.isprotected(f)):
isowned = True
break
if not isowned:
collisions.append(f)
print "existing file "+f+" is not owned by this package"
stopmerge = True
if collision_ignore:
if f in collision_ignore:
stopmerge = False
else:
for myignore in collision_ignore:
if f.startswith(myignore + os.path.sep):
stopmerge = False
break
if stopmerge:
print red("*")+" This package is blocked because it wants to overwrite"
print red("*")+" files belonging to other packages (see messages above)."
print red("*")+" If you have no clue what this is all about report it "
print red("*")+" as a bug for this package on http://bugs.gentoo.org"
print
print red("package "+self.cat+"/"+self.pkg+" NOT merged")
print
print
print "Searching all installed packages for file collisions..."
print "Press Ctrl-C to Stop"
print
""" Note: The isowner calls result in a stat call for *every*
single installed file, since the inode numbers are used to work
around the problem of ambiguous paths caused by symlinked files
and/or directories. Though it is slow, it is as accurate as
possible."""
found_owner = False
for cpv in self.vartree.dbapi.cpv_all():
cat, pkg = catsplit(cpv)
mylink = dblink(cat, pkg, destroot, self.settings,
vartree=self.vartree)
mycollisions = []
for f in collisions:
if mylink.isowner(f, destroot):
mycollisions.append(f)
if mycollisions:
found_owner = True
print " * %s:" % cpv
print
for f in mycollisions:
print " '%s'" % \
os.path.join(destroot, f.lstrip(os.path.sep))
print
if not found_owner:
print "None of the installed packages claim the above file(s)."
print
sys.exit(1)
try:
os.chdir(mycwd)
except OSError:
pass
def _security_check(self, installed_instances):
if not installed_instances:
return 0
file_paths = set()
for dblnk in installed_instances:
file_paths.update(dblnk.getcontents())
inode_map = {}
real_paths = set()
for path in file_paths:
try:
s = os.lstat(path)
except OSError, e:
if e.errno != errno.ENOENT:
raise
del e
continue
if not stat.S_ISREG(s.st_mode):
continue
path = os.path.realpath(path)
if path in real_paths:
continue
real_paths.add(path)
if s.st_nlink > 1 and \
s.st_mode & (stat.S_ISUID | stat.S_ISGID):
k = (s.st_dev, s.st_ino)
inode_map.setdefault(k, []).append((path, s))
suspicious_hardlinks = []
for path_list in inode_map.itervalues():
path, s = path_list[0]
if len(path_list) == s.st_nlink:
# All hardlinks seem to be owned by this package.
continue
suspicious_hardlinks.append(path_list)
if not suspicious_hardlinks:
return 0
from portage.output import colorize
prefix = colorize("SECURITY_WARN", "*") + " WARNING: "
writemsg(prefix + "suid/sgid file(s) " + \
"with suspicious hardlink(s):\n", noiselevel=-1)
for path_list in suspicious_hardlinks:
for path, s in path_list:
writemsg(prefix + " '%s'\n" % path, noiselevel=-1)
writemsg(prefix + "See the Gentoo Security Handbook " + \
"guide for advice on how to proceed.\n", noiselevel=-1)
return 1
def treewalk(self, srcroot, destroot, inforoot, myebuild, cleanup=0,
mydbapi=None, prev_mtimes=None):
"""
This function does the following:
calls self._preserve_libs if FEATURES=preserve-libs
calls self._collision_protect if FEATURES=collision-protect
calls doebuild(mydo=pkg_preinst)
Merges the package to the livefs
unmerges old version (if required)
calls doebuild(mydo=pkg_postinst)
calls env_update
calls elog_process
@param srcroot: Typically this is ${D}
@type srcroot: String (Path)
@param destroot: Path to merge to (usually ${ROOT})
@type destroot: String (Path)
@param inforoot: root of the vardb entry ?
@type inforoot: String (Path)
@param myebuild: path to the ebuild that we are processing
@type myebuild: String (Path)
@param mydbapi: dbapi which is handed to doebuild.
@type mydbapi: portdbapi instance
@param prev_mtimes: { Filename:mtime } mapping for env_update
@type prev_mtimes: Dictionary
@rtype: Boolean
@returns:
1. 0 on success
2. 1 on failure
secondhand is a list of symlinks that have been skipped due to their target
not existing; we will merge these symlinks at a later time.
"""
if not os.path.isdir(srcroot):
writemsg("!!! Directory Not Found: D='%s'\n" % srcroot,
noiselevel=-1)
return 1
if not os.path.exists(self.dbcatdir):
os.makedirs(self.dbcatdir)
otherversions = []
for v in self.vartree.dbapi.cp_list(self.mysplit[0]):
otherversions.append(v.split("/")[1])
slot_matches = self.vartree.dbapi.match(
"%s:%s" % (self.mysplit[0], self.settings["SLOT"]))
if self.mycpv not in slot_matches and \
self.vartree.dbapi.cpv_exists(self.mycpv):
# handle multislot or unapplied slotmove
slot_matches.append(self.mycpv)
others_in_slot = []
from portage import config
for cur_cpv in slot_matches:
# Clone the config in case one of these has to be unmerged since
# we need it to have private ${T} etc... for things like elog.
others_in_slot.append(dblink(self.cat, catsplit(cur_cpv)[1],
self.vartree.root, config(clone=self.settings),
vartree=self.vartree))
retval = self._security_check(others_in_slot)
if retval:
return retval
if slot_matches:
# Used by self.isprotected().
max_dblnk = None
max_counter = -1
for dblnk in others_in_slot:
cur_counter = self.vartree.dbapi.cpv_counter(dblnk.mycpv)
if cur_counter > max_counter:
max_counter = cur_counter
max_dblnk = dblnk
self._installed_instance = max_dblnk
# get current counter value (counter_tick also takes care of incrementing it)
# XXX Need to make this destroot, but it needs to be initialized first. XXX
# XXX bis: leads to some invalidentry() call through cp_all().
# Note: The counter is generated here but written later because preserve_libs
# needs the counter value but has to be before dbtmpdir is made (which
# has to be before the counter is written) - genone
counter = self.vartree.dbapi.counter_tick(self.myroot, mycpv=self.mycpv)
myfilelist = None
mylinklist = None
# Preserve old libs if they are still in use
if slot_matches and "preserve-libs" in self.settings.features:
myfilelist = listdir(srcroot, recursive=1, filesonly=1, followSymlinks=False)
mylinklist = filter(os.path.islink, [os.path.join(srcroot, x) for x in listdir(srcroot, recursive=1, filesonly=0, followSymlinks=False)])
mylinklist = [x[len(srcroot):] for x in mylinklist]
self._preserve_libs(srcroot, destroot, myfilelist+mylinklist, counter)
# check for package collisions
if "collision-protect" in self.settings.features:
if myfilelist == None:
myfilelist = listdir(srcroot, recursive=1, filesonly=1, followSymlinks=False)
if mylinklist == None:
mylinklist = filter(os.path.islink, [os.path.join(srcroot, x) for x in listdir(srcroot, recursive=1, filesonly=0, followSymlinks=False)])
mylinklist = [x[len(srcroot):] for x in mylinklist]
self._collision_protect(srcroot, destroot, others_in_slot,
myfilelist+mylinklist, mylinklist)
if True:
""" The merge process may move files out of the image directory,
which causes invalidation of the .installed flag."""
try:
os.unlink(os.path.join(
os.path.dirname(normalize_path(srcroot)), ".installed"))
except OSError, e:
if e.errno != errno.ENOENT:
raise
del e
self.dbdir = self.dbtmpdir
self.delete()
if not os.path.exists(self.dbtmpdir):
os.makedirs(self.dbtmpdir)
writemsg_stdout(">>> Merging %s %s %s\n" % (self.mycpv,"to",destroot))
# run preinst script
if myebuild is None:
myebuild = os.path.join(inforoot, self.pkg + ".ebuild")
a = doebuild(myebuild, "preinst", destroot, self.settings, cleanup=cleanup,
use_cache=0, tree=self.treetype, mydbapi=mydbapi,
vartree=self.vartree)
# XXX: Decide how to handle failures here.
if a != os.EX_OK:
writemsg("!!! FAILED preinst: "+str(a)+"\n", noiselevel=-1)
return a
# copy "info" files (like SLOT, CFLAGS, etc.) into the database
for x in listdir(inforoot):
self.copyfile(inforoot+"/"+x)
# do we have a origin repository name for the current package
repopath = os.sep.join(self.settings["O"].split(os.sep)[:-2])
if mydbapi != None:
for reponame in mydbapi.getRepositories():
if mydbapi.getRepositoryPath(reponame) == repopath:
fd = open(os.path.join(self.dbtmpdir, "repository"), "w")
fd.write(reponame+"\n")
fd.close()
break
# write local package counter for recording
lcfile = open(os.path.join(self.dbtmpdir, "COUNTER"),"w")
lcfile.write(str(counter))
lcfile.close()
# open CONTENTS file (possibly overwriting old one) for recording
outfile = open(os.path.join(self.dbtmpdir, "CONTENTS"),"w")
self.updateprotect()
#if we have a file containing previously-merged config file md5sums, grab it.
conf_mem_file = os.path.join(destroot, CONFIG_MEMORY_FILE)
cfgfiledict = grabdict(conf_mem_file)
if self.settings.has_key("NOCONFMEM"):
cfgfiledict["IGNORE"]=1
else:
cfgfiledict["IGNORE"]=0
# Don't bump mtimes on merge since some application require
# preservation of timestamps. This means that the unmerge phase must
# check to see if file belongs to an installed instance in the same
# slot.
mymtime = None
# set umask to 0 for merging; back up umask, save old one in prevmask (since this is a global change)
prevmask = os.umask(0)
secondhand = []
# we do a first merge; this will recurse through all files in our srcroot but also build up a
# "second hand" of symlinks to merge later
if self.mergeme(srcroot, destroot, outfile, secondhand, "", cfgfiledict, mymtime):
return 1
# now, it's time for dealing our second hand; we'll loop until we can't merge anymore. The rest are
# broken symlinks. We'll merge them too.
lastlen = 0
while len(secondhand) and len(secondhand)!=lastlen:
# clear the thirdhand. Anything from our second hand that
# couldn't get merged will be added to thirdhand.
thirdhand = []
self.mergeme(srcroot, destroot, outfile, thirdhand, secondhand, cfgfiledict, mymtime)
#swap hands
lastlen = len(secondhand)
# our thirdhand now becomes our secondhand. It's ok to throw
# away secondhand since thirdhand contains all the stuff that
# couldn't be merged.
secondhand = thirdhand
if len(secondhand):
# force merge of remaining symlinks (broken or circular; oh well)
self.mergeme(srcroot, destroot, outfile, None, secondhand, cfgfiledict, mymtime)
#restore umask
os.umask(prevmask)
#if we opened it, close it
outfile.flush()
outfile.close()
for dblnk in others_in_slot:
if dblnk.mycpv != self.mycpv:
continue
writemsg_stdout(">>> Safely unmerging already-installed instance...\n")
self.contentscache = None
others_in_slot.append(self) # self has just been merged
others_in_slot.remove(dblnk) # dblnk will unmerge itself now
dblnk.unmerge(trimworld=0, ldpath_mtimes=prev_mtimes,
others_in_slot=others_in_slot)
writemsg_stdout(">>> Original instance of package unmerged safely.\n")
break
# We hold both directory locks.
self.dbdir = self.dbpkgdir
self.delete()
_movefile(self.dbtmpdir, self.dbpkgdir, mysettings=self.settings)
contents = self.getcontents()
#write out our collection of md5sums
if cfgfiledict.has_key("IGNORE"):
del cfgfiledict["IGNORE"]
my_private_path = os.path.join(destroot, PRIVATE_PATH)
if not os.path.exists(my_private_path):
os.makedirs(my_private_path)
os.chown(my_private_path, os.getuid(), portage_gid)
os.chmod(my_private_path, 02770)
writedict(cfgfiledict, conf_mem_file)
del conf_mem_file
# regenerate reverse NEEDED map
self.vartree.dbapi.libmap.update()
#do postinst script
a = doebuild(myebuild, "postinst", destroot, self.settings, use_cache=0,
tree=self.treetype, mydbapi=mydbapi, vartree=self.vartree)
# XXX: Decide how to handle failures here.
if a != os.EX_OK:
writemsg("!!! FAILED postinst: "+str(a)+"\n", noiselevel=-1)
return a
downgrade = False
for v in otherversions:
if pkgcmp(catpkgsplit(self.pkg)[1:], catpkgsplit(v)[1:]) < 0:
downgrade = True
#update environment settings, library paths. DO NOT change symlinks.
env_update(makelinks=(not downgrade),
target_root=self.settings["ROOT"], prev_mtimes=prev_mtimes,
contents=contents, env=self.settings.environ())
writemsg_stdout(">>> %s %s\n" % (self.mycpv,"merged."))
return os.EX_OK
def mergeme(self, srcroot, destroot, outfile, secondhand, stufftomerge, cfgfiledict, thismtime):
"""
This function handles actual merging of the package contents to the livefs.
It also handles config protection.
@param srcroot: Where are we copying files from (usually ${D})
@type srcroot: String (Path)
@param destroot: Typically ${ROOT}
@type destroot: String (Path)
@param outfile: File to log operations to
@type outfile: File Object
@param secondhand: A set of items to merge in pass two (usually
or symlinks that point to non-existing files that may get merged later)
@type secondhand: List
@param stufftomerge: Either a diretory to merge, or a list of items.
@type stufftomerge: String or List
@param cfgfiledict: { File:mtime } mapping for config_protected files
@type cfgfiledict: Dictionary
@param thismtime: The current time (typically long(time.time())
@type thismtime: Long
@rtype: None or Boolean
@returns:
1. True on failure
2. None otherwise
"""
from os.path import sep, join
srcroot = normalize_path(srcroot).rstrip(sep) + sep
destroot = normalize_path(destroot).rstrip(sep) + sep
# this is supposed to merge a list of files. There will be 2 forms of argument passing.
if isinstance(stufftomerge, basestring):
#A directory is specified. Figure out protection paths, listdir() it and process it.
mergelist = listdir(join(srcroot, stufftomerge))
offset = stufftomerge
else:
mergelist = stufftomerge
offset = ""
for x in mergelist:
mysrc = join(srcroot, offset, x)
mydest = join(destroot, offset, x)
# myrealdest is mydest without the $ROOT prefix (makes a difference if ROOT!="/")
myrealdest = join(sep, offset, x)
# stat file once, test using S_* macros many times (faster that way)
try:
mystat = os.lstat(mysrc)
except OSError, e:
writemsg("\n")
writemsg(red("!!! ERROR: There appears to be ")+bold("FILE SYSTEM CORRUPTION.")+red(" A file that is listed\n"))
writemsg(red("!!! as existing is not capable of being stat'd. If you are using an\n"))
writemsg(red("!!! experimental kernel, please boot into a stable one, force an fsck,\n"))
writemsg(red("!!! and ensure your filesystem is in a sane state. ")+bold("'shutdown -Fr now'\n"))
writemsg(red("!!! File: ")+str(mysrc)+"\n", noiselevel=-1)
writemsg(red("!!! Error: ")+str(e)+"\n", noiselevel=-1)
sys.exit(1)
except Exception, e:
writemsg("\n")
writemsg(red("!!! ERROR: An unknown error has occurred during the merge process.\n"))
writemsg(red("!!! A stat call returned the following error for the following file:"))
writemsg( "!!! Please ensure that your filesystem is intact, otherwise report\n")
writemsg( "!!! this as a portage bug at bugs.gentoo.org. Append 'emerge info'.\n")
writemsg( "!!! File: "+str(mysrc)+"\n", noiselevel=-1)
writemsg( "!!! Error: "+str(e)+"\n", noiselevel=-1)
sys.exit(1)
mymode = mystat[stat.ST_MODE]
# handy variables; mydest is the target object on the live filesystems;
# mysrc is the source object in the temporary install dir
try:
mydstat = os.lstat(mydest)
mydmode = mydstat.st_mode
except OSError, e:
if e.errno != errno.ENOENT:
raise
del e
#dest file doesn't exist
mydstat = None
mydmode = None
if stat.S_ISLNK(mymode):
# we are merging a symbolic link
myabsto = abssymlink(mysrc)
if myabsto.startswith(srcroot):
myabsto = myabsto[len(srcroot):]
myabsto = myabsto.lstrip(sep)
myto = os.readlink(mysrc)
if self.settings and self.settings["D"]:
if myto.startswith(self.settings["D"]):
myto = myto[len(self.settings["D"]):]
# myrealto contains the path of the real file to which this symlink points.
# we can simply test for existence of this file to see if the target has been merged yet
myrealto = normalize_path(os.path.join(destroot, myabsto))
if mydmode!=None:
#destination exists
if not stat.S_ISLNK(mydmode):
if stat.S_ISDIR(mydmode):
# directory in the way: we can't merge a symlink over a directory
# we won't merge this, continue with next file...
continue
if os.path.exists(mysrc) and stat.S_ISDIR(os.stat(mysrc)[stat.ST_MODE]):
# Kill file blocking installation of symlink to dir #71787
pass
elif self.isprotected(mydest):
# Use md5 of the target in ${D} if it exists...
try:
newmd5 = perform_md5(join(srcroot, myabsto))
except FileNotFound:
# Maybe the target is merged already.
try:
newmd5 = perform_md5(myrealto)
except FileNotFound:
newmd5 = None
mydest = new_protect_filename(mydest, newmd5=newmd5)
# if secondhand is None it means we're operating in "force" mode and should not create a second hand.
if (secondhand != None) and (not os.path.exists(myrealto)):
# either the target directory doesn't exist yet or the target file doesn't exist -- or
# the target is a broken symlink. We will add this file to our "second hand" and merge
# it later.
secondhand.append(mysrc[len(srcroot):])
continue
# unlinking no longer necessary; "movefile" will overwrite symlinks atomically and correctly
mymtime = movefile(mysrc, mydest, newmtime=thismtime, sstat=mystat, mysettings=self.settings)
if mymtime != None:
writemsg_stdout(">>> %s -> %s\n" % (mydest, myto))
outfile.write("sym "+myrealdest+" -> "+myto+" "+str(mymtime)+"\n")
else:
print "!!! Failed to move file."
print "!!!", mydest, "->", myto
sys.exit(1)
elif stat.S_ISDIR(mymode):
# we are merging a directory
if mydmode != None:
# destination exists
if bsd_chflags:
# Save then clear flags on dest.
dflags = mydstat.st_flags
if dflags != 0:
bsd_chflags.lchflags(mydest, 0)
if not os.access(mydest, os.W_OK):
pkgstuff = pkgsplit(self.pkg)
writemsg("\n!!! Cannot write to '"+mydest+"'.\n", noiselevel=-1)
writemsg("!!! Please check permissions and directories for broken symlinks.\n")
writemsg("!!! You may start the merge process again by using ebuild:\n")
writemsg("!!! ebuild "+self.settings["PORTDIR"]+"/"+self.cat+"/"+pkgstuff[0]+"/"+self.pkg+".ebuild merge\n")
writemsg("!!! And finish by running this: env-update\n\n")
return 1
if stat.S_ISLNK(mydmode) or stat.S_ISDIR(mydmode):
# a symlink to an existing directory will work for us; keep it:
writemsg_stdout("--- %s/\n" % mydest)
if bsd_chflags:
bsd_chflags.lchflags(mydest, dflags)
else:
# a non-directory and non-symlink-to-directory. Won't work for us. Move out of the way.
if movefile(mydest, mydest+".backup", mysettings=self.settings) is None:
sys.exit(1)
print "bak", mydest, mydest+".backup"
#now create our directory
if self.settings.selinux_enabled():
import selinux
sid = selinux.get_sid(mysrc)
selinux.secure_mkdir(mydest,sid)
else:
os.mkdir(mydest)
if bsd_chflags:
bsd_chflags.lchflags(mydest, dflags)
os.chmod(mydest, mystat[0])
os.chown(mydest, mystat[4], mystat[5])
writemsg_stdout(">>> %s/\n" % mydest)
else:
#destination doesn't exist
if self.settings.selinux_enabled():
import selinux
sid = selinux.get_sid(mysrc)
selinux.secure_mkdir(mydest, sid)
else:
os.mkdir(mydest)
os.chmod(mydest, mystat[0])
os.chown(mydest, mystat[4], mystat[5])
writemsg_stdout(">>> %s/\n" % mydest)
outfile.write("dir "+myrealdest+"\n")
# recurse and merge this directory
if self.mergeme(srcroot, destroot, outfile, secondhand,
join(offset, x), cfgfiledict, thismtime):
return 1
elif stat.S_ISREG(mymode):
# we are merging a regular file
mymd5 = perform_md5(mysrc, calc_prelink=1)
# calculate config file protection stuff
mydestdir = os.path.dirname(mydest)
moveme = 1
zing = "!!!"
mymtime = None
if mydmode != None:
# destination file exists
if stat.S_ISDIR(mydmode):
# install of destination is blocked by an existing directory with the same name
moveme = 0
writemsg_stdout("!!! %s\n" % mydest)
elif stat.S_ISREG(mydmode) or (stat.S_ISLNK(mydmode) and os.path.exists(mydest) and stat.S_ISREG(os.stat(mydest)[stat.ST_MODE])):
cfgprot = 0
# install of destination is blocked by an existing regular file,
# or by a symlink to an existing regular file;
# now, config file management may come into play.
# we only need to tweak mydest if cfg file management is in play.
if self.isprotected(mydest):
# we have a protection path; enable config file management.
destmd5 = perform_md5(mydest, calc_prelink=1)
if mymd5 == destmd5:
#file already in place; simply update mtimes of destination
moveme = 1
else:
if mymd5 == cfgfiledict.get(myrealdest, [None])[0]:
""" An identical update has previously been
merged. Skip it unless the user has chosen
--noconfmem."""
moveme = cfgfiledict["IGNORE"]
cfgprot = cfgfiledict["IGNORE"]
if not moveme:
zing = "-o-"
mymtime = long(mystat.st_mtime)
else:
moveme = 1
cfgprot = 1
if moveme:
# Merging a new file, so update confmem.
cfgfiledict[myrealdest] = [mymd5]
elif destmd5 == cfgfiledict.get(myrealdest, [None])[0]:
"""A previously remembered update has been
accepted, so it is removed from confmem."""
del cfgfiledict[myrealdest]
if cfgprot:
mydest = new_protect_filename(mydest, newmd5=mymd5)
# whether config protection or not, we merge the new file the
# same way. Unless moveme=0 (blocking directory)
if moveme:
mymtime = movefile(mysrc, mydest, newmtime=thismtime, sstat=mystat, mysettings=self.settings)
if mymtime is None:
sys.exit(1)
zing = ">>>"
if mymtime != None:
zing = ">>>"
outfile.write("obj "+myrealdest+" "+mymd5+" "+str(mymtime)+"\n")
writemsg_stdout("%s %s\n" % (zing,mydest))
else:
# we are merging a fifo or device node
zing = "!!!"
if mydmode is None:
# destination doesn't exist
if movefile(mysrc, mydest, newmtime=thismtime, sstat=mystat, mysettings=self.settings) != None:
zing = ">>>"
else:
sys.exit(1)
if stat.S_ISFIFO(mymode):
outfile.write("fif %s\n" % myrealdest)
else:
outfile.write("dev %s\n" % myrealdest)
writemsg_stdout(zing + " " + mydest + "\n")
def merge(self, mergeroot, inforoot, myroot, myebuild=None, cleanup=0,
mydbapi=None, prev_mtimes=None):
retval = -1
self.lockdb()
try:
retval = self.treewalk(mergeroot, myroot, inforoot, myebuild,
cleanup=cleanup, mydbapi=mydbapi, prev_mtimes=prev_mtimes)
# Process ebuild logfiles
elog_process(self.mycpv, self.settings)
if retval == os.EX_OK and "noclean" not in self.settings.features:
if myebuild is None:
myebuild = os.path.join(inforoot, self.pkg + ".ebuild")
doebuild(myebuild, "clean", myroot, self.settings,
tree=self.treetype, mydbapi=mydbapi, vartree=self.vartree)
finally:
self.unlockdb()
return retval
def getstring(self,name):
"returns contents of a file with whitespace converted to spaces"
if not os.path.exists(self.dbdir+"/"+name):
return ""
myfile = open(self.dbdir+"/"+name,"r")
mydata = myfile.read().split()
myfile.close()
return " ".join(mydata)
def copyfile(self,fname):
import shutil
shutil.copyfile(fname,self.dbdir+"/"+os.path.basename(fname))
def getfile(self,fname):
if not os.path.exists(self.dbdir+"/"+fname):
return ""
myfile = open(self.dbdir+"/"+fname,"r")
mydata = myfile.read()
myfile.close()
return mydata
def setfile(self,fname,data):
write_atomic(os.path.join(self.dbdir, fname), data)
def getelements(self,ename):
if not os.path.exists(self.dbdir+"/"+ename):
return []
myelement = open(self.dbdir+"/"+ename,"r")
mylines = myelement.readlines()
myreturn = []
for x in mylines:
for y in x[:-1].split():
myreturn.append(y)
myelement.close()
return myreturn
def setelements(self,mylist,ename):
myelement = open(self.dbdir+"/"+ename,"w")
for x in mylist:
myelement.write(x+"\n")
myelement.close()
def isregular(self):
"Is this a regular package (does it have a CATEGORY file? A dblink can be virtual *and* regular)"
return os.path.exists(os.path.join(self.dbdir, "CATEGORY"))
def tar_contents(contents, root, tar, protect=None, onProgress=None):
from portage.util import normalize_path
root = normalize_path(root).rstrip(os.path.sep) + os.path.sep
id_strings = {}
maxval = len(contents)
curval = 0
if onProgress:
onProgress(maxval, 0)
paths = contents.keys()
paths.sort()
for path in paths:
curval += 1
try:
lst = os.lstat(path)
except OSError, e:
if e.errno != errno.ENOENT:
raise
del e
if onProgress:
onProgress(maxval, curval)
continue
contents_type = contents[path][0]
if path.startswith(root):
arcname = path[len(root):]
else:
raise ValueError("invalid root argument: '%s'" % root)
live_path = path
if 'dir' == contents_type and \
not stat.S_ISDIR(lst.st_mode) and \
os.path.isdir(live_path):
# Even though this was a directory in the original ${D}, it exists
# as a symlink to a directory in the live filesystem. It must be
# recorded as a real directory in the tar file to ensure that tar
# can properly extract it's children.
live_path = os.path.realpath(live_path)
tarinfo = tar.gettarinfo(live_path, arcname)
# store numbers instead of real names like tar's --numeric-owner
tarinfo.uname = id_strings.setdefault(tarinfo.uid, str(tarinfo.uid))
tarinfo.gname = id_strings.setdefault(tarinfo.gid, str(tarinfo.gid))
if stat.S_ISREG(lst.st_mode):
if protect and protect(path):
# Create an empty file as a place holder in order to avoid
# potential collision-protect issues.
tarinfo.size = 0
tar.addfile(tarinfo)
else:
f = open(path)
try:
tar.addfile(tarinfo, f)
finally:
f.close()
else:
tar.addfile(tarinfo)
if onProgress:
onProgress(maxval, curval)
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